KR20110115977A - Cutting device for producing vertically running trenches in the ground - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for creating a trench in the vertical direction to the ground. It includes, the cutting wheel arrangement is arranged adjacent to each other on the bottom of the cutting frame to remove soil material under the cutting frame. The present invention is characterized in that the trench wall cutter has an adjustment means capable of adjusting the first cutting wheel arrangement in an oblique direction below the second cutting wheel arrangement.

Description

Cutting device for producing vertically running trenches in the ground}

The present invention relates to a cutting device for creating a vertical trench in the ground according to the preamble of claim 1. Such a cutting device is a trench wall cutter having a cutting frame, a first cutting wheel arrangement and a second cutting wheel arrangement. Designed so that a cutting wheel arrangement is arranged adjacent to each other on the underside of the cutting frame to remove ground material under the cutting frame. .

General cutting devices are known, for example, from EP 0 802 286 A2. In this known cutter the cutting wheel is pivotable about an axis perpendicular to the cutting wheel axis in order to create a trench that is enlarged in a small area.

Other trench wall cutters with pivotable cutting wheels are available in DE 36 02 387 C1, EP 0 496 926 A1, EP 0 109 907 A2, FR 2 565 290 A1 and FR 2 579 Known in 265 A1.

It is an object of the present invention to provide a particularly versatile cutting device in use, characterized by particularly high reliability.

The object is solved according to the invention by a cutting device having the features of claim 1. Preferred embodiments are described in the dependent claims.

The trench wall cutter of the cutting device according to the invention is adapted for adjusting the first cutting wheel arrangement in an oblique direction under the second cutting wheel arrangement. means).

The basic idea of the invention can be found in the fact that a first cutting wheel arrangement is provided adjustable for a cutting frame and a second cutting wheel arrangement. According to the invention, the first cutting wheel arrangement is adjustable in an oblique direction under the second cutting wheel arrangement, i.e. an adjustment that can take place by adjusting means. The adjusting movement has, on the one hand, a horizontal component in the direction towards the vertical component and the second cutting wheel arrangement. For example, the first cutting wheel arrangement can be adjusted in a curved path surrounding the second cutting wheel arrangement by adjusting means. In particular, the adjusting means according to the invention such that this curved path is located in a plane extending perpendicular to the axis of rotation of the first cutting wheel arrangement and / or the second cutting wheel arrangement. means) can be designed.

Adjusting means according to the invention make it possible to produce oblique removal surfaces. Furthermore, the cutting cross of the two cutting wheel arrangements through the oblique movement of the first cutting wheel arrangements under the second cutting wheel arrangements. -sections can be partially overlapped, for example, in the case of particularly hard ground materials.

With respect to the constructional work performed, it is advantageous for the adjusting means to have at least one steering bar, through which the first cutting wheel arrangement is arranged for the cutting frame. connected to a cutting frame. Such a steering bar, as provided in accordance with the invention, makes it possible to predetermine the adjustment path of the area obliquely positioned under the second cutting wheel arrangement in a particularly simple and reliable manner. In particular, the adjusting means may have two parallelly positioned steering bars, through which the first cutting wheel arrangement is connected to the cutting frame. As a result, a four-bar linkage can be formed that creates the adjustment path provided in accordance with the present invention so that a very reliable and minimal construction work is possible. In particular, if a four-bar linkage moves like a parallelogram, it is effective that the axes of rotation of the two cutting wheel arrangements always have the same distance during movement. In this way, the ground material of the non-removed ridge, where the trench wall cutter may be stranded, is prevented from remaining between the cutting wheels. Most suitably, the axes of articulation of at least one steering bar, in particular the axes of articulation of two parallel steering bars, are the cutting wheel arrangements. parallel to the axis of rotation of the arrangement. The four-bar linkage according to the invention may also be called a coupling rocker.

At least one guide means for guiding the cutting frame at the guide pole, on the guide side of the trench wall cutter, in order to produce the trench particularly accurately. It may be advantageous to have a cutting frame. In this way, a trench wall cutter can be obtained which can be guided, in particular, in a guide pole running in the vertical direction during the descent to the ground.

Guide means may have, for example, at least one guide shoe. In particular, the guide means can have at least two guide shoes arranged on top of each other, whereby jamming is eliminated. Preferably, the at least one guide shoe may have an undercut that surrounds the guide rail at the guide pole. In particular, the guide shoe may be designed as a slide shoe or a roller guide shoe.

It is particularly useful that the adjustable first cutting wheel arrangement is arranged closer to the guide side than the second cutting wheel arrangement. Therefore, according to this embodiment, the cutting wheel arrangement, which is adjustable by adjusting means, is located on the guide side while the second cutting wheel arrangement is Located in a direction far from the guide side. In this embodiment the first cutting wheel arrangement positioned adjacent to the guide pole can be moved away from the guide pole by adjusting means. This, in turn, allows the adjusting means to move the first cutting wheel arrangement away from the pole foot, thus preventing it from being cut into the pole foot. A guide pole with a widened pole foot can be used.

When guide means are present, a guide pole can be provided according to the invention in which a trench wall cutter is guided by guide means. Thus, the cutting device may also comprise a guide pole.

In particular, the guide pole may have at least one conveyor line carrying ground material which is removed by a cutting wheel arrangement. According to this embodiment the guide pole can serve two functions: to guide the cutter on the one hand and to carry the ground material away from the resulting trench on the other hand. For example, the conveyor line may be located inside the guide pole. In that case, the guide pole may have at least one passage opening on its outer surface through which ground material passes through the conveyor line.

According to the present invention, the first cutting wheel arrangement has at least one first cutting wheel and the second cutting wheel arrangement has at least one second cutting wheel. cutting wheel). In order to produce the trench, it is particularly advantageous for the axes of rotation of the first and second cutting wheels to be parallel to each other.

It is particularly preferred that the first cutting wheel and the second cutting wheel have the same cutting direction. This can also be considered as an independent aspect of the invention that can be realized without adjusting means. According to the invention the cutting direction can be understood in a side view of a trench wall cutter. For example, when viewed from the side view of the cutter, all of the rotating cutting wheels can be cut clockwise, or when viewed from the same side, all the cutting wheels can be cut counterclockwise. The same cutting direction is particularly advantageous if, for example, the drill spoil removed from the guide pole is transported decentralized. In the case of the same cutting direction, all cutting wheels carry the ground material removed in the same direction towards the decentralized discharge site, preferably during the cutting operation.

For a particularly good cutting effect, the first cutting wheel arrangement comprises a first cutting wheel pair having a first cutting wheel arranged in two coaxial and a second cutting wheel arrangement. The cutting wheel arrangement may comprise a second cutting wheel pair having a second cutting wheel arranged in two coaxially. For example, two cutting wheel arrangements may have each cutting shield, in which case cutting wheels are arranged on both sides of the cutting shield. For the reasons mentioned above, general cutting directions may be advantageous for cutting wheel pairs. Therefore, in particular, in the side view of the trench wall cutter, the cutting wheel of the first cutting wheel pair and the cutting wheel of the second cutting wheel pair are It is preferable that all have the same cutting direction.

It is particularly useful for the cutting wheels that are rotating in the cutting direction to carry ground material on their underside towards the guide side. According to this embodiment, the cutting wheel is not only in the cutting role but also during the cutting and also on the guide side and on the guide side of the conveyor line of the conveyor line of the conveyor line. It also serves to transport the removed ground material towards the surface.

With regard to the construction work performed, it is particularly advantageous for the trench wall cutter to be suspended in a cable suspension. This cable suspension allows the trench wall cutter to descend into the ground and retract from the trench created in the ground. According to the invention, in particular the lateral guidance can be ensured due to the guide means and the guide poles, which can be realized only occasionally to a limited extent by means of a cable suspension.

According to the invention, a second cutting wheel arrangement, in particular a cutting wheel arrangement located further away from the guide mast, is fixed in a cutting frame. In other words, unlike the first cutting wheel arrangement, the second cutting wheel arrangement is not adjustable relative to the cutting frame. This allows for reliable guidance along the trench.

In order to ensure a particularly reliable drive and adjustment of the first cutting wheel arrangement, it is useful for the adjusting means to have at least one hydraulic cylinder. The adjusting means can then also be called hydraulic adjusting means. Preferably, the hydraulic cylinder is connected on the one hand to a cutting frame and on the other hand to a first cutting wheel arrangement. For compact construction with minimal amount of power consumption, the connection point of the cutting frame and the hydraulic cylinder is suitably provided above the connection point of the cutting wheel arrangement and the hydraulic cylinder. In particular, the hydraulic cylinder can operate in at least about a vertical direction.

For example, a first cutting wheel arrangement is located above at least one cutting wheel of the first cutting wheel arrangement and is a hydraulic cylinder and / or at least one steering bar. bar may have an auxiliary frame to which the bar is connected.

In another preferred embodiment of the present invention at least one extensible flap is provided in the cutting frame to secure the trench wall cutter to the trench wall. Such an extensible flap causes the trench wall cutter to be pressed against the wall of the trench, thereby preventing vertical movement of the trench wall cutter by friction with the wall. As soon as the cutting frame with the extended flap is fixed, for example adjusting means can be activated and in so doing the first cutting wheel arrangement can be loaded. . As a result, a structure in which there is a load added to only one of the two cutting wheel arrangements, that is, the first cutting wheel arrangement, can be achieved.

In order to increase the operational reliability, it is particularly advantageous that the expandable flap is connected to the cutting frame via two parallel flap steering bars. In particular, a four-bar linkage can be formed to adjust the flap. Therefore, the axes of articulation of the flap steering bar are moderately parallel to each other.

It is advantageous to provide at least two expandable flaps for securing the trench wall cutter to the trench wall to ensure that the trench wall cutter operates in particular reliably. In particular, it may be advantageous for the two flaps to be able to extend perpendicular to one another. For example, the first flap may extend in a direction perpendicular to the axis of rotation of the cutting wheel arrangement and the second flap may extend in the direction of the axis of rotation of the cutting wheel arrangement.

The invention also relates to a method for creating a trench running perpendicular to the ground, wherein the cutting wheel arrangement of the trench wall cutter of the cutting device according to the invention is activated and the trench wall cutter is operated. A trench wall cutter is introduced into the ground.

Next, the present invention will be described in more detail through preferred embodiments outlined in the accompanying drawings:
1 is a perspective view of a trench wall cutter of a cutting device according to the invention;
FIG. 2 is a side view of the trench wall cutter of FIG. 1 with the first cutting wheel arrangement in a neutral position;
3 is an enlarged view of FIG. 2 with a first cutting wheel arrangement; FIG. And
4 shows a cutting device with the trench wall cutter of FIGS. 1-3.

1 to 3 show a trench wall cutter 1 according to the invention for a cutting device according to the invention. The trench wall cutter 1 comprises a box-shaped cutting frame 10 with the trench wall cutter 1 hanging on the cable suspension 19 on the upper side of the cutting frame 10. Two cutting wheel arrangements 21, 22 are provided on the bottom of the cutting frame 10. Therefore, the cutting wheel arranging devices 21 and 22 are arranged in the advance direction of the cutting frame 10.

In particular, as shown in FIG. 1, the first cutting wheel arrangement 21 includes a cutting shield 25 facing down in the vertical direction, and cutting wheels 23, 23 ′ on both sides of the cutting shield 25, respectively. ) Is arranged. The two cutting wheels 23, 23 ′ of the first cutting wheel arrangement 21 have a common axis of rotation extending in a common horizontal direction and are designed coaxially with respect to each other. Similar to the first cutting wheel arrangement 21, the second cutting wheel arrangement 22 also includes a second cutting shield 26 that faces downward in the vertical direction, both sides of the second cutting shield 26. The second cutting wheels 24 and 24 'are arranged in each. Similarly, the second cutting wheels 24, 24 ′ also have rotational axes running in a common horizontal direction and are designed coaxially with respect to each other. The axes of rotation of the first cutting wheels 23, 23 ′ and the second cutting wheels 24, 24 ′ are parallel to each other.

For the rotational operation of the first cutting wheels 23, 23 ′, the first cutting wheel arrangement 21 has a first drive motor 27 arranged above the cutting shield 25. Similarly, for the rotational operation of the second cutting wheels 24, 24 ′, the second cutting wheel arrangement 22 has a second drive motor 28 arranged above the second cutting shield 26.

In addition, the first cutting wheel arrangement 21 has an auxiliary frame 29 which is shown in a substantially triangular form in the side views of FIGS. 2 and 3. This auxiliary frame 29 can move relative to the cutting frame 10. The first cutting shield 25 is fixed to the bottom of the auxiliary frame 29. In addition, the drive motor 27 of the first cutting wheel arrangement 21 is arranged in the auxiliary frame 29.

The second cutting wheel arrangement 22 is provided in a manner fixed to the cutting frame 10. In contrast, the first cutting wheel arrangement 21 is adjustable on the cutting frame 10 by means of the adjustment means 30, and thus on the second cutting wheel arrangement 22, in this case with FIGS. 2 and 3. In comparison, the function of the adjusting means 30 can be clearly seen. One side (right side in FIGS. 2 and 3) of the adjustment means 30 is connected to the cutting frame 10 and the other side (left side in FIGS. 2 and 3) is the first cutting wheel arrangement 21, ie the auxiliary frame 29. Have two consecutive steering bars 31, 32. All connecting axes of the steering bars 31 and 32 are not only parallel to the rotation axes of the cutting wheels 23 and 24, but also parallel to each other in the horizontal direction. As a result of arranging the steering bars 31, 32, there is a four-bar linkage, of which the first connection is by the first steering bar 31, and the second connection is by the cutting frame 10. ), The third connection is formed by the second steering bar 32 and the fourth connection is formed by the auxiliary frame 29. As shown in FIGS. 2 and 3, this four-bar linkage allows the first cutting wheel arrangement 21 to the cutting frame 10 and thereby the second cutting wheel arrangement 22. The first cutting wheel arrangement 21 may be obliquely positioned below the second cutting wheel arrangement 22 along this path, thereby allowing the first cutting wheel arrangement 21 to follow. Preset by a four-bar linkage of the adjusting means 30 such that the axis of the first cutting wheel 23 maintains approximately the same distance to the axis of the second cutting wheel 24 during the movement operation. The path is designed. As depicted in FIG. 3, the cutting cross sections of the cutting wheel 23 and the cutting wheel 24 may overlap each other during the movement operation caused by the adjusting means 30.

As also shown in FIGS. 2 and 3, the adjustment means 30 also have a linear drive designed as a hydraulic cylinder 34. This hydraulic cylinder 34 runs in a substantially vertical direction, one side of which is connected to the cutting frame 10 over the auxiliary frame 29 and the other to the auxiliary frame 29 of the first cutting wheel arrangement 21 itself. . As shown in FIG. 3, when the hydraulic cylinder 34 is enlarged, the first cutting wheel arrangement 21 is enlarged downward. On the other hand, when the hydraulic cylinder 34 is retracted, the cutting wheel arrangement 21 moves back toward the cutting frame 10 until the neutral position shown in FIG. 2 is reached, and the cutting wheel arrangements 21, 22 All, in particular their axes of rotation, are at the same height. In the neutral position both steering bars 31, 32 run in the horizontal direction, as shown in FIG. 2.

The trench wall cutter 1 on the left side of FIGS. 1 to 3 has guide means having two guide shoes 11, 12 arranged up and down in the cutting frame 10. The side of the cutter, on which the guide shoes 11, 12 are arranged, can therefore also be called the guide side 3. As will be explained in greater detail below with respect to FIG. 4, the guide shoes 11, 12 serve to guide the trench wall cutter 1 in the guide pawl 70.

1 to 3, the trench wall cutter 1 has flaps 41 and 42 which are expandable in its cutting frame, and the cutting frame 10 in the trench wall created by the flap. Can be fixed. The first flap 41 is arranged on the frame side opposite the guide side 3. The second, small flaps 42 are arranged in pairs before and after the cutting frame 10, i.e., in the direction located in the direction of the axis of rotation of the cutting wheels 23, 24. The first flap 41 is arranged through two parallel working flap steering bars 43, 43 ′ to the cutting frame 10 so that the first flap 41, flap steering bars 43, 43 ′ and the cutting frame ( 10) form another four-bar linkage. Similarly, the second flap 42 is connected to the cutting frame 10 through two parallel flap steering bars 44, 44 ′ to form another four-bar linkage. For an effective extension of the first flap 41, a hydraulic cylinder 45 is provided and for an effective extension of the second flap 42 a hydraulic cylinder 46 is provided. Both flaps 41 and 42 may extend in a direction perpendicular to each other, that is, the first flap 41 may extend in a direction perpendicular to the rotation axis of the cutting wheels 23 and 24 and the second flap 42 may be in the rotation axis. It may extend in a direction parallel to the.

4 shows a cutting device according to the invention, wherein the trench wall cutters of FIGS. 1 to 3 are arranged in the guide pawl 70 during the method according to the invention. This guide pawl 70 is introduced into the ground 5 in at least substantially vertical direction. For this reason, for example, a drill hole can be created in the ground 5. The guide pawl 70 can also introduce the trench wall cutter 1 into a pre-generated trench section.

Through guide means having guide shoes 11, 12, the trench wall cutter 1 is arranged so as to be movable in a direction perpendicular to the guide pole 70 so that the trench wall cutter ( When 1) descends to the ground 5, the guide pole 70 determines the cutting direction in advance. Thus, the guide shoes 11 and 12 wrap the rail in the longitudinal direction of the guide pole 70.

As shown in FIG. 4, while the trench wall cutter 1 is lowered, the first cutting wheel arrangement 21 can be moved forward by the adjusting means 30 at least temporarily in an advance direction. An oblique removal surface can be created.

Inside the guide pole 70, a conveyor line 71 may be provided in line with the discharge means 72. Through this conveyor line 71, the ground material removed by the cutting wheel arrangements 21 and 22 may be discharged.

As shown in FIGS. 2 and 3, the first cutting wheel 23 has cutting teeth 51 and the second cutting wheel 24 has cutting teeth 52. The cutting teeth 51, 52 are designed such that the rotating cutting wheel arrangements 21, 22 cut in the same cutting direction. In the described embodiment, the cutting teeth 51, 52 are formed such that in the side view of FIGS. 2 and 3, all of the cutting wheels 23, 23 ′, 24, 24 ′ are cut clockwise while rotating. As the cutting wheels 23 and 24 rotate, the ground material is removed from the underside of the cutting wheel (toward the guide side 3 in the cutting direction and thus towards the guide pole 70 (to the left in the illustrated embodiment). The cutting direction is selected to carry the material. Thus, the cutting wheels 23, 23 ', 24, 24' not only select in-situ ground material, but at the same time the cutting wheels 23, 23 ', 24, 24' are guided. The soil material is conveyed towards the pole 70, thereby towards the conveyor line 71.

While the trench wall cutter 1 is operating, the cutting wheels 23, 23 ′, 24, 24 ′ are set to rotate in one direction and the trench wall cutter 1 moves the guide poles 70 to the ground 5. Thus introduced. In this way, the cutting wheels 23, 23 ′, 24, 24 ′ remove in-situ ground material and at the same time ground material is discharged through the conveyor line 71. It is carried toward the guide pole (70).

In order to create an oblique removal cross section, the first flap 41 and the second flap 42 are extended so that the cutting frame 10 is temporarily fixed against vertical movement, and then the hydraulic pressure of the adjusting means 30 By extending the cylinder 34, the first cutting wheel arrangement 21 is thereby lowered in an oblique direction below the second cutting wheel arrangement 22.

Claims (15)

A cutting device for creating a trench in the vertical direction on the ground,
A trench wall cutter comprising a cutting frame, a first cutting wheel arrangement, and a second cutting wheel arrangement,
The cutting wheel arranging devices are arranged adjacent to each other on the underside of the cutting frame to remove the ground material under the cutting frame,
The trench wall cutter includes adjusting means for adjusting the first cutting wheel arrangement in an oblique direction below the second cutting wheel arrangement. The method of claim 1,
The adjusting device includes two parallel steering bars, through which the first cutting wheel arrangement is connected to the cutting frame. The method of claim 1,
The cutting frame comprises at least one guide means for guiding the cutting frame at a guide pole on the guide side of the trench wall cutter. The method of claim 3,
And the guide means comprises at least two guide shoes arranged in a vertical direction. The method of claim 3,
And the first cutting wheel arrangement, which is more adjustable than the second cutting wheel arrangement, is arranged closer to the guide side. The method of claim 3,
A guide pole is provided to guide the trench wall cutter by the guide means.
And the guide pawl includes at least one conveyor line for carrying soil material removed by the cutting wheel arrangement. The method of claim 1,
The first cutting wheel arrangement includes at least one first cutting wheel,
The second cutting wheel arrangement includes at least one second cutting wheel,
And the first cutting wheel and the second cutting wheel have the same cutting direction. The method of claim 3,
And the cutting wheel rotating in the cutting direction carries soil material from the bottom of the cutting wheel toward the guide side. The method of claim 1,
The trench wall cutter is suspended in a cable suspension. The method of claim 1,
The second cutting wheel arrangement is a cutting device that is fixedly arranged on the cutting frame. The method of claim 1,
And said adjusting means comprises at least one hydraulic cylinder, one side of said hydraulic cylinder being connected to said cutting frame and the other side of said hydraulic cylinder being connected to said first cutting wheel arrangement. The method of claim 1,
And at least one expandable flap securing said trench wall cutter to a trench wall in said cutting frame. The method of claim 12,
The expandable flap is connected to the cutting frame via two flap steering bars. The method of claim 12,
And at least two expandable flaps securing the trench wall cutter to the trench walls, the two flaps being able to extend perpendicular to each other. The method of claim 1 wherein the cutting wheel arrangement of the trench wall cutter of the cutting device is operated to create a trench perpendicular to the ground into which the trench wall cutter is introduced into the ground.

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